GB2508402A - A mount arrangement for electrical equipment housings - Google Patents

A mount arrangement for electrical equipment housings Download PDF

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Publication number
GB2508402A
GB2508402A GB1221593.5A GB201221593A GB2508402A GB 2508402 A GB2508402 A GB 2508402A GB 201221593 A GB201221593 A GB 201221593A GB 2508402 A GB2508402 A GB 2508402A
Authority
GB
United Kingdom
Prior art keywords
frame
mount
aperture
strut
housings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1221593.5A
Other versions
GB2508402B (en
Inventor
Charles Antony Cachia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Control Techniques Ltd
Original Assignee
Control Techniques Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Control Techniques Ltd filed Critical Control Techniques Ltd
Priority to GB1221593.5A priority Critical patent/GB2508402B/en
Priority to IN3677MU2013 priority patent/IN2013MU03677A/en
Priority to CN201320778617.7U priority patent/CN203675509U/en
Priority to CN201310634688.4A priority patent/CN103857254A/en
Priority to US14/093,683 priority patent/US20140151311A1/en
Publication of GB2508402A publication Critical patent/GB2508402A/en
Application granted granted Critical
Publication of GB2508402B publication Critical patent/GB2508402B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B21/00—Tables or desks for office equipment, e.g. typewriters, keyboards
    • A47B21/04—Tables or desks for office equipment, e.g. typewriters, keyboards characterised by means for holding or fastening typewriters or computer equipment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/18—Construction of rack or frame

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Casings For Electric Apparatus (AREA)
  • Patch Boards (AREA)
  • Distribution Board (AREA)

Abstract

The mount comprises a rectangular frame 10 and a floating strut 18 which rests on the frame to sub-divide the aperture into smaller spaces, where each space receives an electrical housing (eg a motor drive controller). The frame of the strut engages a gasket on the housing to seal each side of the frame from the other. The strut also provides mating surfaces for adjacent electrical housings. The aperture to be subdivided may, instead of a frame, be cut into the bulkhead or rear panel of an electronic equipment enclosure. Multiple housings can be installed in the same frame and the strut and gaskets provide sealing between in the inside and the outside of the frame from the ingress of dust or water.

Description

A MOUNT FOR ELECTRICAL EQuIPMENT This invention relates to a mount for electrical equipment, such as a drive controller for an electric motor.
The installation of electrical equipment in a site requires the individual unil Lo be mounted in a logical and/or orderly manner usually within a bulkhead. The term If al equipment" includes any processor-based or data. processing equipment. For example, a drive for controlling an electi-ic motor typically comes in its own housing which is mounted in a bulkhead ol all enclosure. Each housing can he mounted individually in the bulkhead.. One oF the problems that all such installations face is the airborne dust, water and debris that can contaminate the equipment. This can be exacerbated by the common need of electrical equipment for cooling fans to circulate air through the housing to prevent components overheating. Cooling fans draw in airborne particulates and, direct them into the housing. To address tlus it is known to install such equipment with part of the housing projecting from the bulkhead into a clean air (filtered) environment.
A bulkhead. may have to accommodate multiple housings (of multiple electrical equipment).
Each can have its own aperture iii the bulkhead. For reasons of economy of space it is better to group the housings together in a single opening. However, tlns presents a problem in that there are gaps between the housings that can allow "dirty" air into the space inside (lie enclosure (behind the bulkhead). The housings can he made with flat adjacent surfaces that mate so as not to leave a gap. In practice this is rarely adequate due to manufacturing and installation tolerances.
What is needed is a reliably sealable bulkhead fitting for mounting a housing of electrical equipment.
According to disclosed embodiments there is provided, a. bulkhead fitting for mounting multiple housings (or cabinets or chassis) of electrical equiprn.ern, comprising a bulkhead defining a generally rectangular aperture for multiple housings which arc adapted to mate with edges of the bulkhead dcfuiing part of the aperture, a strut engaged with opposite sides of the bulkhead. abl.e to adopt a position along the edges between adjacent housings, providiiig a further mating edge for the adjacent housings.
Tn one form there is provided a mount for multiple housings of electrical equipment, comprising a frame defining an aperture, one or more struts (or support bars or beams) resting between opposed sides of the frame defining the aperture, the aperture being sub-divided by the struts to define corresponding multiple through holes for mounting the housings.
Preferably, the struL supports a gasket that can seal against the ingress of dirt and particulates across the bulkhead, Preferably, the gasket is also supported by the frame. Preferably, the strut has a stiffening portion in between the opposed sides of the fi-ame which improves the rigidity of or strengthens the strut.
The frame may be part of the bulkhead or it may be a separate item which is itself mounted in the bulkhead An assembly of multiple housings each of electrical equipment can be installed in the respective sub-divisions of the aperture. Each housing can define a sealing surthee that engages the sides of the frame and the supporting bar in the aperture.
Embodiments will now be described by way of example with reference to the accompanying drawings in which: Figuie 1 is a ftonl. view of a mounting frame for a. bulkhead; Figures 2A, B, Care views ala StrtLt shown in Figure 1; and Figures 3-6 arc views of various stages of assembly of a mounting frame for housings of electrical equipment.
Referring to Figures 1 and 2, a mounting frame 10 for a housing of electrical equipment is a rectangle of steel or aluminium plate of opposed long and short sides 12/14. It could, of course, he a rigid plastics material or any other suitable metal sufficiently strong to hold a housing of electrical equipment. The frame is itself located in an aperture of a bulkhead (not shown). The frame 10 has spaced holcs 16 for fastening deces as described below. Also shown in the drawings is a. separate gasket strut 18 which is shown in more detail in Figure 2.
The strut 18 comprises longitudinally running support flanges 20 and 22 which extend from a central stiffening rib 24. The flanges 20 and 22 are a clearance fit between opposing edges of the two short sides 14 of the frame. The rib 24 extends beyond the flanges longitudinally across part of the adjacent surfaces of the short sides to define a.ja.w 26 at each end of the strut 18 that engages about its corresponding edge of the respective short sides 14 of the frame.
The inner part of each jaw 26 is radiused and has a diameter that is greater than the jaw spacing. The radius also helps to reduce stresses in the surrounding area. The recess 28 thus formed provides a clearance that allows the strut 18 to rest on the sides without snagging any inconsistencies in the otherwise straight edge of the short arms caused by, for example, damage or manufacturing defects. The strut 18 is introduced on to the frame 10 diagonally and iotated so that each end engages its corresponding short side 14. The strut iSis then free to slide along the sides.
In place the slrtLt 18 rests on a front (outer) face of the frame 10. Figure 3 shows a. pair oF such struts 12 in position on the Frame 10. Detail of one end of ti-ic sirut I 8 on its cot-responding short side 14 is shoi in Figure 4. The upper surface of each flange 20/22 is hush with the adjaccnt surface of the short side 14. The clearance provided by the radius in the end of the jaw 26 can be seen.
In Figure 5 a housing 30 which houses, in this case. a processor-based, electrical, motor controller is showii being arranged for insertion in the frame 10 between one of the long sides 12 of the frame and one of the struts 1 8. The housing 30 houses processing and control circuitry and cooling fans, and is in its function conventional. The outer face 32 of the housing 30 provides interfaces for inserting memory devices, plugging in other equipment such as diagnostic equipment and the like.. At ti-ic junction 34 between ti-ic front part of housing 12 and the back there is a rearward facing fiat ledge 36 which extends around the housing. A gasket 38 of clastomcric material is arranged on this lcdgc 36 and is shown in Figure 6. It mates with the front facing surfaces of the long side 12, the adjacent surfaces of the short sides 14 and the flush surface of one of the flanges 20 of thc strut 18. The assembly thus provides a simple but very effective seal between the opposite sides of the frame. The strut IS is located in position adjacent housing 30 hut is also held securely in place by the jaws engaging the sides of the frame at opposite ends such that the pressure exerted by the housing 30 on the flange of the strut 18 is sufficient to hold it in place The rigidity of the strut 18 is enhanced by the rib 24 and providcs a supporting surface for the gasket 38 to seal against the ledge of the housing.
The front and rear of the frame are sealed from one another by multiple housings being installed in the spaces between the struts 1 2 and the long sides 12 of the frame 10 as shown in Figure 7. The other outer housing engages the opposite long side of the frame from that shown. The middl.e h.ousin.g engages two of the struts 18 instead. The housings are retained in S position in the frame 10 by clamps 40 that are fastened in the holes 16 referred to above that are törnied in the frame. The frame itself is then loaded into a suitably dimensioned aperture in a bulkhead between a control space into which the front of the housings face and a clean environment into which the tears of the housings extend. In some embodiments, the aperture is cut directly into the bulkhead, or rear panel of the enclosure.
The frame assembly provides a very efficient way of sealing multiple housings iii the same frame or bulkhead and provides a fully sealed junction between the two sides of the frames or bulkhead. The housings can be of different widths. [he struts 18 are easily moved along the sides of the frame to fit the housing dimensions.
In some embodiments, there are fans on both sides of the enclosure. The outside is considered as the dirty' air environment, while the inside is considered as the clean air (filtered) environment. The fans on the outside thus circulate or how dirty air on the outside of the bulkhead and the fans on the inside circulate clean or filtered air on the inside of the hulkhead Tn other embodiments, the fans are only on the inside. Natural convection currents arc relied upon br cooling the part of the equipment on the outside. In all of these embodiments, the sealing gasket stops dirty' air contaminated with dust and water Found on [lie outside from enterii-ig inside where the clean air is circulating.

Claims (8)

  1. CLAIMS1. A mount for multiple housings of electrica.1 equipment, comprising a frame defining an aperture, and one or more struts resting between opposed sides of the frame defining the aperture, the aperture being sub-divided by the struts to define corresponding multiple through holes for mounting the housings.
  2. 2. A mount as claimed in claim 1 in which the strut supports a gasket.
  3. 3. A mount as claimed in claim 2 in which the gasket is also supported by the frame.
  4. 4. A mount a claimed in any of claims 13 in which the strut has a stiffeming portion in bctwcen the opposed sides of the frame.
  5. 5. A mount as claimed in any of claims 1-4 in which the frame is part of a bulkhead.
  6. 6. A mount as claimed in any of claims 1-4 in which the frame is separate from but retained by a bulkhead.
  7. 7. An assembly of a mount as claimed in any of claims 1-6 and multiple housings of electiical equipment installed in the respective sub-divisions of the aperture.
  8. 8. An assembly as claimed in claim 7 in which each housing defines a sealing surface Lilat engages the edges of Ilie ftanie and the slLpporting strut in the aperture.Amendments to the claims have been filed as follows:CLAIMS1. A mount for multiple housings of electrical equipment, comprising a frame defining an aperture, and one or more struts resting on and positionable between opposed sides of the frame defining the aperture, the aperture being sub-divided by the struts to define corresponding multiple through holes for mounting the housings, wherein the or each strut has a surface that is flush with the surface defining the aperture and is slidable along the opposed sides of the frame.2. A mount as claimed in claim I in which the strut supports a gasket.3. A mount as claimed in claim 2 in which the gasket is also supported by the frame.4. A mount as claimed in any of claims 1-3 in which the strut has a stiffening portion in between the opposed sides of the frame. C1)5. A mount as claimed in any of claims 1-4 in which the frame is part of a bulkhead. r6. A mount as claimed in any of claims 1-4 in which the frame is separate from but retained by a bulkhead.7. An assembly of a mount as claimed in any of claims 1-6 and multiple housings of electrical equipment installed in the respective sub-divisions of the aperture.8. An assembly as claimed in claim 7 in which each housing defines a sealing surface that engages the edges of the frame and the supporting strut in the aperture.
GB1221593.5A 2012-11-30 2012-11-30 A mount for electrical equipment Expired - Fee Related GB2508402B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB1221593.5A GB2508402B (en) 2012-11-30 2012-11-30 A mount for electrical equipment
IN3677MU2013 IN2013MU03677A (en) 2012-11-30 2013-11-22
CN201320778617.7U CN203675509U (en) 2012-11-30 2013-12-02 Installing board and mounting assembly including the same
CN201310634688.4A CN103857254A (en) 2012-11-30 2013-12-02 Mount and mounting assembly including same
US14/093,683 US20140151311A1 (en) 2012-11-30 2013-12-02 Mount For Electrical Equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1221593.5A GB2508402B (en) 2012-11-30 2012-11-30 A mount for electrical equipment

Publications (2)

Publication Number Publication Date
GB2508402A true GB2508402A (en) 2014-06-04
GB2508402B GB2508402B (en) 2015-05-27

Family

ID=50683745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1221593.5A Expired - Fee Related GB2508402B (en) 2012-11-30 2012-11-30 A mount for electrical equipment

Country Status (4)

Country Link
US (1) US20140151311A1 (en)
CN (2) CN203675509U (en)
GB (1) GB2508402B (en)
IN (1) IN2013MU03677A (en)

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Also Published As

Publication number Publication date
CN203675509U (en) 2014-06-25
GB2508402B (en) 2015-05-27
CN103857254A (en) 2014-06-11
US20140151311A1 (en) 2014-06-05
IN2013MU03677A (en) 2015-07-31

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